Why grow Azolla filiculoides (water fern) nitrogen fixing / high protein - This is worth reading if you are frugal

[clarkinks]

It might be a nice addition to exisiting aquaponics as @sharq @Noddykitty @JohannsGarden were describing there are many uses.

Aquaponics

We’ve discussed aquaponics Aquaponics | Alternative Farming Systems Information Center | NAL | USDA briefly but is anyone actually doing it right now? If you are do you collect roof water runoff? A regular sized house is said to collect 500-700 gallons of water per inch of rain water that falls. A 275 water tank can be found used easily for $100 here http://kansascity.craigslist.org/grd/5675845791.html. In Kansas we have plenty of space to raise grains for fish food. Grains such as soybeans are …